tampa police dept

I used to listen to a scanner from about the age of 17 - 20. I'm now in my 40's and was thinking I wanted to do it again. However, reading over the forum a little I am completely lost. It's amazing what one can forget what they once knew. Anyway, my question is can someone advise me on a...

What are primary control numbers or should I just program all of them. I see they have East and West, what groups pair with them? Also, should I use Decimal or AFS